[issue2120] zgrep command missing on leaf

["Thomas Nikolajsen \(via DragonFly issue tracker\)" <sinknull@xxxxxxxxxxxxxxxxxxxxx>]

Thomas Nikolajsen <thomas.nikolajsen@mail.dk> added the comment:

Nice; please commit.

Didn't notice --label=FILE option on new grep;
grep.1 even hints on zgrep use.

New zgrep isn't perfect: doesn't support -r (or -d ACTION),
-iv (only -i -v) or multiple -e PATTERN,
but this should be easy to fix.

PS: Your patch has a few files TO_REMOVE which aren't related to zgrep

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